Improvement in ovens



PATEN'I' OFFICE.

ISAAC H. SIIAVEPu, OF OEDAB EAPIDS, IOW A.

IIVIPROVEll/IENT IN OVNS.

Specification forming part of Letters Patent No.116,762, dated July 4, 1871.

T0 all whom *t mag con-cam:

Be it known that I, ISAAC H. SIIAV'ER, of (Jedar Itapids, county of Linn and State of Iowa,

have invented a new and Improved Method of Constructing Bakery Ovens, and I hereby (leclare the following to be a full and exact description thereof, reference being had to the acco1npanying drawing, and to the letters and tigures of reference marked thereon.

lily invention relates to the arrangement of the oven-plates, the compact form in which I build niy oven, the equal and uniform distribution of heat throughout the oven, and econoinizing the fuel required to heat the same and in order that others may properly understand niy invention and the manner in which my improved apparatus is to be used, I will proceed to describe the same in detail.

I build my oven in tlle form of a rectangular parallelogram and of any desired dimensions, the walls generally about two feet in thickness, the one represented in the drawing being about twenty feet higlntwenty-one feet wide, and six feet in depth, with 'a division-wall in the middle running from top to bottom, thereby formin g the oven into two sections or apartments. In each of these sections I place a series of oven-plates Of soap-stone or other material, and of aily desired number, as shown in the drawing by (t 0 c cl ef, and arranged in a peculiar manner as follows: Plate 01, in the right-hand section of the drawing, is made to lit the oven-wall nicely at the left e11d, but leaving an open space of about four inches at the right end, while the next plate b fits at the righthand, leaving the opening at the left end, and so on alternately through the whole series of plates, so that a zigzag line is thus formed of the plates, through which the heat as it rises from the furnaces A A through the lines K K K must pass, coming in Contact With the whole surface of all the plates. These plates are supported and held in position by an iron frame-work in each section, formed by a succession of cast-iron frames of the proper size and strength, placed in ahorizontal position, extendin g across and litting in the oven, except the space at each alternate end, as before described. Each frame is supported and kept in its place by four iron rods, one at each of the four corners, With a set-screw on each rod under each frame, and on which the frame securely rests. The said plates are tted to and laid on these frames. The plates and frame-work in each section *are connected together by an iron chain, (J, passing over the pulleys B P, cach section nicely balancing the other, so that they are easily raised or lowered in the oven at will by mechanical connection at either pulley, and, to prevent friction alld cause them to move freely and steadily in the oven, I place in the middle of the oven, at eacl1 end of each section, a perpendicular bar Of iron, H H H H, with a groove in the same forming a guide or track, in which runs a small wheel, 10, attached to the projecting ends of the frames LL 1) and of'. The whole are 'tther arranged in such a man ner that plate ct in one section is always in the san1e horizontal plane with plate f' of the otl1er section when at the oven-mouth, and the Same is true of all the other corresponding plates. The result Of this is that, in operating the oven, when the top plate of one section is at the mouth of the oven the bottom plate of the other section will also be at the mouth, so that both sections are readily operated at the same time. In addition to con ducting the heat over the plates, as above described, and that the sa1ne may be carefully equalized throughout the whole oven, I build from the furnace a connected system of lines, K K K, extending around the oven and up through the division-wall in the center, and up to within about five feet of the top, with numerous openings from the same into the oven, as shown in the drawing by 8 8, and to be more or less numerous as in eacl1 case may be desired, so that as the plates are being constantly raised and lowered each one is receiving an equal amount of heat over its entire surface, whether it be in the top or bottom of the oven, and at the same time great economy of heat is obtained.

The dranght is formed by the Opening from cach section into the chimney, and may be closed by the da1nper.

L L are a-sh-boxes beneath the grating A A.

The oven may be built 'any desired height, and a greater number of plates may be used than here described.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The above-described frame-work of iro11 running upon the guides H H, substantially as and and for the purpose set forth.

2. The system of oven-plates (1: b c Li ef, constrnetei of soap-stone OI' its equivalent, and arrangeci as set forth anti described.

3.- l`he combination 'of the framework in each section of the oven with the pul1eys P P and Chain (3 to bringthe plates to the oven-doors in the manner and for the urpose herein set forth and described.

.L. The combination of the frame-work and oven-piates With the system of fines K and opening'S 8, substantiaily as herein described. 4

In testimony whereoi' I have signed illy name to this speeiiieation in the presence of two subscribing vvtnesses this 25th day of J une, 1870.

Witnesses: I. H. SHAVEB.

H. BENINECCT, H. B. STIBBS. 

